CN103121878B - Double membrane slow release fertilizer containing humic acid and preparation method thereof - Google Patents

Double membrane slow release fertilizer containing humic acid and preparation method thereof Download PDF

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CN103121878B
CN103121878B CN201310073208.1A CN201310073208A CN103121878B CN 103121878 B CN103121878 B CN 103121878B CN 201310073208 A CN201310073208 A CN 201310073208A CN 103121878 B CN103121878 B CN 103121878B
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fertilizer
release
film
layer
slow
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CN201310073208.1A
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CN103121878A (en
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冯广祥
田原宇
乔生
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北京澳佳肥业有限公司
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Abstract

The invention relates to a double membrane slow release fertilizer containing humic acid and a preparation method thereof. The double membrane slow release fertilizer consists of a fertilizer core, a first envelope and a second envelope and is prepared by the components in parts by weight as follows: 90-98 parts of fertilizer core, 0.5-5 parts of first envelope, 1-5 parts of second envelope and 0.5-2 parts of bonder. According to the double membrane slow release fertilizer containing humic acid, gelatin and humic acid are taken as a membrane material and can be degraded to amino acids and fulvic acid which can be directly absorbed by crops or converted into soil organic matters without damaging soil structure or polluting soil.

Description

A kind of two film slow-release fertilizers and preparation method containing humic acids

Technical field

The present invention relates to the fertilizer containing humic acids, be specifically related to a kind of two film slow-release fertilizers containing humic acids and preparation method thereof.

Background technology

Chemical fertilizer occupies critical role in agriculture production, is supporting agricultural 55% output as " grain of grain ", is spending the input of agricultural 50%, is an important ring of the modern agriculture integration system that forms of breeding, good fertilizer, good opportunity, good system, good recipe.Particularly, in current population sustainable growth, in the situation of arable land continuous decrease, chemical fertilizer more becomes one of important factor supporting farm output.

But, in addition it is improper to use because fertilizer product is backward, cause China's fertilizer nutrient this season utilization ratio on the low side, nitrogenous fertilizer is 30%-40%, phosphate fertilizer is 10%-25%, and potash fertilizer is 35%-50%, and this has not only wasted the energy, resource, also significantly increased agricultural cost, it is reported that the annual nitrogen loss of China just reaches hundred million yuan of hundreds ofs.Excessive fertilization also causes the damage and pollution of agricultural-food, soil, water, atmosphere is even jeopardized to human health simultaneously.How effective, safe raising utilization rate of fertilizer, is the problem that we must face.

Since the sixties in 20th century, the countries such as America and Europe start the research that the characteristic by changing chemical fertilizer itself improves the utilization ratio of fertilizer, develop the innovative products such as slow (control) release fertilizer, stabile fertilizer, thereby have increased substantially utilization rate of fertilizer.

Stabile fertilizer generally refers to and in nitrogenous fertilizer, adds urease inhibitor and nitrification inhibitor, delays hydrolysis of urea and changes into ammonium or suppress nitrobacteria ammonium ion is oxidized to NO thereby suppress urease activity 2-and NO 3-process, play the target of slowly-releasing, also claim controlled availability fertilizer.

Slow (control) release fertilizer refers generally to realize slowly-releasing or controlled release target by changing solvability delivery mode.Conventionally slowly-releasing (slow release) refers to that chemical substance nutrient release rate is much smaller than the rate of release that changes plant effective state nutrient after Quick-dissolving fertilizer is manured into soil into; Controlled release (controlled release) refers to various regulatory mechanisms and makes nutrient release consistent with the rule of Crop nutrient according to the release mode (release rate and time of releasing) of setting.Slow (control) release fertilizer generally can be divided into the types such as microsolubility organic nitrogen compound (as: urea-formaldehyde fertilizer, IBDU etc.), microsolubility mineral compound (as metal phosphorus ammonium salt, acidifying phosphoric acid salt etc.), coated fertilizer, matrix composite and cementing release and release control fertilizer.

Wherein, coated fertilizer is one of fertile type of main flow of current slow (control) release fertilizer, common are non-organism coated fertilizer, organic polymer coated fertilizer and thermoplastic resin membrane wrapping fertilizer etc.

Non-organism coated fertilizer mainly comprises sulfur-coated urea, fused(calcium magnesium)phosphate coated urea, divalent metal ammonium phosphate sylvite coated urea etc., and coated fertilizer mostly is plant nutrient element, also referred to as " fertile bag is fertile ".

Organic polymer coated fertilizer is on fertiliser granulates, the hydrophobic polymer coating being formed by heat cured resin crosslinks.Conventional have alkyd based resin and a polyurethanes resin.The coated with resin fertilizer that commercialization is the earliest produced is the Synolac coated fertilizer that the U.S. in 1967 produces in California.Synolac is the multipolymer of dicyclopentadiene and glyceryl ester, and the release of nutrient can be controlled by changing the composition of film or the thickness of film.Nutrient dispose procedure is: moisture in film, has been increased the seepage water pressure in film and causes film to expand by the micropore permeation on film, and expanding has increased again micropore, and nutrient is discharged from the hole increasing.Polyurethane kind coating is the wear-resistant Controlled Release Fertilizer directly generating with paracyanogen base and polyol reaction on fertiliser granulates surface.Nutrient discharges and mainly depends on temperature variation, and soil moisture content, pH, alternation of wetting and drying and biological activity of soil are on discharging almost without impact.

Thermoplastic resin membrane wrapping fertilizer is that thermoplastic membrane wrapping material (as polyethylene) is dissolved in chlorinated hydrocarbon, in fluidized-bed reactor, is sprayed on fertiliser granulates.Nutrient discharges can be by being mixed resin (as EVA) stronger with water-permeable the polyethylene of bad hydraulic permeability to control, also can in film, add a kind of mineral powder to improve by temperature controlled nutrient and discharge, there is good nutrient control release rate and release profiles.

Another kind of fertilizer type related to the present invention is matrix composite and cementing release and release control fertilizer, its be mainly by fertilizer nutrient with can reduce its deliquescent material and mix, by bonding, the effect such as cementing, make the fertilizer with the slow release function of nutrient, as: add organic high molecular polymer, humic acids etc.

The related fertilizer that relates to coated fertilizer (urea), humic acids has following report:

CN99117649.9 discloses a kind of Wrapped urea humate that is applicable to slow release fertilizer, and inside is urea, and skin is wrapped up by humic acids.Its manufacture method: throw urea 75-95 part, starting operation in reactor; To urea surface spray solution, (solvent is water, and solute accounts in solution: NaOH:1-5%, Na 2cO 3: 1-6%, NaOnSiO 3: 6-9%) 1-2 part), running 3-5 minute; The low-grade coal 4-23 part that added 60 mesh sieves, reruns 5-20 minute; Dry, drying machine temperature in 80-100 DEG C, temperature out 40-50 DEG C; Sieve, packaging.

CN01111071.6 discloses a kind of Wrapped urea humate and preparation method thereof, after adopting coal humic acid activated, react the method for handing over bag to be coated with urea granules, its humic acid urea weight percent consists of: moisture 3-5%, ash content 2-12%, humic acids 3-18%, urea 70-95%.

CN200810139611 discloses a kind of humic acid membrane wrapping control-releasing fertilizer, it is to use binding agent and solidifying agent thereof that solid film material is wrapped in to the coating controlled-release fertilizer that fertiliser granulates surface makes, and prepares: the first step: granulated fertilizer is added in encapsulation tool to urethane resin and solidifying agent tung oil thereof, soya-bean oil, oleum lini after preheating by following technique; Second step: humic acid solid film material is spread on the fertiliser granulates of motion, continue heating and keep temperature, solidify to form shock resistance, wear-resisting coating layer, complete coating one time; The 3rd step: repeat in order first and second step repeatedly, make required humic acid membrane wrapping control-releasing fertilizer.

The relevant report that relates to two film fertilizer (urea) is as follows:

CN201210154343 discloses a kind of double-contracting film composite fertilizer producing process.Adopt industrial formol, urea and polyvinyl alcohol condensation reaction to generate the first layer coating, adopt the organic and middle micro-complex reaction of amino acid to generate second layer coating, in revolving drum, utilize spray equipment that the first layer coating and second layer coating order are sprayed to the outside surface that is wrapped in female fertilizer, form two coated compound fertilizers.

CN201110275712.0 discloses a kind of two-layer coated water-retaining sustained-release fertilizer and preparation method thereof.The double-deck coating that it comprises chemical fertilizer granule and is wrapped in granulated fertilizer surface, the material that wherein forms inner membrance controlled release layer is carrageenin and soluble potassium salt or solubility ammonium salt; The material that forms adventitia water conservation layer is super absorbent resin.

Comprehensively for information about, although release in fertile research and development and application and obtained larger progress in slow (control), still have many problems to need further research both at home and abroad.The one, owing to being subject to the impact of mould material and production technique cost, cause slow (control) to release the on the high side of fertilizer, limit its application and popularization; The 2nd, selected resene coated fertilizer, its degradation cycle is long, may damage Soil structure; The 3rd, coated fertilizer mostly using it solubility rate in water as detect index, this and its release in different soils environment inconsistent, mechanism, mathematics membranous type that therefore under laboratory and field condition, fertilizer nutrient release is released in prediction slow (control) also need further research.

Summary of the invention

The object of the invention is to develop two film slow release fertilizers of a kind of green safety, efficient multicomponent.

The invention provides a kind of two film slow-release fertilizers containing humic acids, formed by fertile core, the first layer coating and second layer coating, made by the composition of following weight part: fertile core 90-98 part, the first layer coating 0.5-5 part, second layer coating 1-5 part and tackiness agent 0.5-2 part form.

Preferably, described pair of film slow-release fertilizer, is made up of the composition of following weight part: fertile core 93.5-96.5 part, the first layer coating 0.5-2 part, second layer coating 2-3 part and tackiness agent 1-1.5 part form.

In above-mentioned pair of film slow-release fertilizer:

Described fertile core is granular urea or compound manure, all can directly be bought by market.Described granular urea should meet GB2440-2001 standard, and selection granularity is 2.00mm-4.75mm.Described compound manure is at least two kinds of nutrients in nitrogenous, phosphorus, three kinds of nutrients of potassium, the spherical granules fertilizer of being made by chemical process, as: the various nutrients such as N:P:K=11:44:0,11:0:32,15:15:15, should meet GB15063-2009 standard, selection granularity is 1.00mm-4.75mm, for ensureing the consistent of the finished product granularity, sub-sieve in advance, choosing granularity is 2.00mm-4.75mm.

In the time that fertile core is granular urea, described pair of film slow-release fertilizer is further preferably made up of the composition of following weight part: 1 part, 96.5 parts, fertile core, 0.5 part of the first layer coating, 2 parts of second layer coatings and tackiness agent.

In the time that fertile core is compound manure, described pair of film slow-release fertilizer is further preferably made up of the composition of following weight part: 1.5 parts, 93.5 parts, fertile core, 2 parts of the first layer coatings, 3 parts of second layer coatings and tackiness agent.

Described the first layer coated fertilizer is made up of the composition of following weight percent: gelatin 1-3%, urea 20-40%, ferrous sulfate 5-25%, zinc sulfate 1-5%, magnesium sulfate 1-5%, manganous sulfate 0.3-2%, boric acid 0.3-2%, ammonium citrate 2-5% and water 30-55%; Preferably, described the first layer coated fertilizer is made up of the composition of following weight percent: gelatin 2-2.5%, urea 20-40%, ferrous sulfate 5-20%, zinc sulfate 1-1.5%, magnesium sulfate 1-1.5%, manganous sulfate 0.5-1%, boric acid 0.5-1%, ammonium citrate 2-2.5% and water 48-51%.

Described second layer coated fertilizer is made up of the composition of following weight percent: humic acids 99% and activator 1%, described activator is potassium hydroxide.It is prepared preferred described second layer coated fertilizer by following methods: take each composition according to proportioning, pulverize and reach 2500-3000 order.

Described tackiness agent is tung oil and paraffin mixed melting thing, the wherein weight percent of tung oil and paraffin: tung oil 70-80%, paraffin 20-30%.

The present invention also provides the method for preparing above-mentioned pair of film slow-release fertilizer, and the method comprises the following steps:

1) preparation of the first layer coated fertilizer: take the each composition in the first layer coated fertilizer according to proportioning, add water, gelatin in reactor A, stir and be warming up to 60-70 DEG C, add urea; In reactor B, add successively water, ferrous sulfate, zinc sulfate, magnesium sulfate, manganous sulfate, boric acid, ammonium citrate etc., stir and heat to 50-60 DEG C; Liquid in reactor B is injected to reactor A, continue to stir 2 hours, make the first layer coated fertilizer, for subsequent use;

2) the first layer coating process: the atomization of the first layer coated fertilizer is coated to the fertile wicking surface in motion, and air seasoning, solidifies in fertile slug particle surface coated fertilizer, completes coating for the first time;

3) second layer coating process: by step 2) a described coated fertilizer preheating, preheating temperature 40-50 DEG C, tackiness agent is evenly coated to the material surface of motion, again second layer coated fertilizer is dispersed evenly to the material surface in motion, and make it to be bonded to material surface, after cooling, obtain the two film slow-release fertilizers containing humic acids.

The present invention also provides the application of above-mentioned two film slow-release fertilizers containing humic acids in the Special Fertilizers for Various Crops material such as preparation winter wheat, corn, cotton, peanut, soybean, paddy rice

Two film slow-release fertilizers containing humic acids provided by the invention have the following advantages:

1, provided by the invention containing in two film slow-release fertilizers of humic acids, taking gelatin and humic acids as mould material, generally can be degraded to amino acid, the xanthohumic acid that crop can directly absorb or be converted into the soil organism at this season, can spoiled soil structure or contaminated soil.Simultaneously in the course of processing of mould material, also added crop essential in, trace element, and by the form of " fertilizer is with micro-fertilizer greatly ", solved the equally distributed problem of micro-fertilizer in using.

2, said slowly-releasing mainly refers to the slowly-releasing of nitrogen, as the slowly-releasing of urea, in sustained-controll-release fertiliser standard (HG/T3931-2007), " nutrient slowly-released rate characterizes by total nitrogen slowly-releasing rate ", inorganic coated composite fertilizer (HG/T4217-2011), the massfraction of total nitrogen " mainly detect slow-release nitrogen account for ", provided by the invention containing in two film slow-release fertilizers of humic acids, shared weight ratio≤6.5% of two membrane structures, especially in two film urea, two shared weight ratios of membrane structure are only 3.5% left and right, content >=44.7%, the nitrogen content of comparing fertile core (granular urea N >=46.4%) only reduces by 3.7%.And the shared mass ratio of most coated slow release fertilizer mould material on market is larger, available nutrient reduces more, and I type product N >=37% of high nitrogen content as in sulfur-coated urea (HG/T3997-2008), compares its fertile core (urea) nitrogen content and decline 20%.

Therefore, the mould material proportion of film-coated and slow release fertilizer that the provided by the invention pair of film slow-release fertilizer compared other types is less, is more conducive to prepare flexibly the bulk blended fertilizer of high nutrient content.

3, in the preparation method of the two film slow-release fertilizers containing humic acids provided by the present invention, coating process flow process can be produced on general compound manure production unit, and less investment, cost are low.

4, product of the present invention can be produced slow release type bulk blended fertilizer, and on the crops such as wheat, corn, cotton, once fertilising can meet the crop whole breeding time of the demand to nutrient, without topdressing.Evidence, its nitrogen utilization efficiency improves 8 percentage points, and can obviously promote crop root growth, improves crop anti-adversity, and increasing both production and income economizes fertile water saving, green safety.

Embodiment

Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.

In embodiment:

Described granular urea or compound manure, all can directly be bought by market.Described granular urea should meet GB2440-2001 standard, and selection granularity is 2.00mm-4.75mm;

The granularity of described compound manure is 1.00mm-4.75mm, for ensureing the consistence of the finished product granularity, and sub-sieve in advance, choosing granularity is 2.00mm-4.75mm.

Clearly do not write in an embodiment oarse-grained scope exactly, all can meet scope of the present invention at granular urea and the compound manure of above-mentioned circumscription.

Embodiment 1: the preparation method who contains two film slow-release fertilizers of humic acids

1, the preparation of the first layer mould material (modified gelatin composite solution), to produce 100 kilograms as example at every turn.

(1) in reactor A, add 15 kilograms, water, 2.5 kilograms, gelatin, soak molten 30 minutes, then stir and be warming up to 60-70 DEG C, after add 20 kilograms, urea;

(2) in reactor B, add 36 kilograms, water, 20 kilograms, ferrous sulfate, 1.5 kilograms, zinc sulfate, 1.5 kilograms, magnesium sulfate, 0.5 kilogram of manganous sulfate, 0.5 kilogram of boric acid, 2.5 kilograms of ammonium citrates successively, stir and heat to 50-60 DEG C;

(3) liquid in reactor B is injected to reactor A, continue to stir 2 hours, make modified gelatin composite solution, for subsequent use.

2, the preparation of second layer mould material (superfine activated humic acids pulvis).To produce 100 kilograms as example at every turn:

By 1 kilogram, 99 kilograms of precomminution 200-400 object humic acidss (total humic acid content >=50%) and activator (potassium hydroxide), after mixing, add micronizer mill, be crushed to 2500-3000 order, collect, for subsequent use.

3, coating process for the first time:

Fertile core-granular urea is quantitatively sent in rotary drum coating machine by travelling belt, in rotary drum coating machine, the first layer mould material (modified gelatin composite solution) atomization is coated to fertile core (granular urea) particle surface in motion, the consumption of the first layer coated fertilizer is 0.5% of two film fertilizer gross weights, pass through again drying machine, air seasoning, solidifies in fertile slug particle surface coated fertilizer and forms composite gel coating, completes coating production technique for the first time.

4, coating process for the second time:

By a coated fertilizer preheating of 3 gained, temperature is 40-50 DEG C, quantitatively sends into rotary drum coating machine, by tackiness agent (by tung oil and paraffin according to weight percent: tung oil 70%, paraffin 30%, mixed melting) be evenly sprayed at the material surface of motion, binder dosage is 1% of two film fertilizer gross weights, by travelling belt, second layer coated fertilizer (superfine activated humic acids pulvis) is quantitatively sent in rotary drum coating machine again, and be dispersed evenly to the material particles surface in motion, the consumption of second layer coated fertilizer is 2% of two film fertilizer gross weights, by stickiness and a motion roll extrusion of tackiness agent, make second layer coated fertilizer can evenly be bonded to material surface, after cooling, obtain secondary coated fertilizer, contain two film slow-release fertilizers of humic acids.

Embodiment 2: the preparation method who contains two film slow-release fertilizers of humic acids

1, the preparation of the first layer mould material (modified gelatin composite solution).To produce 100 kilograms as example at every turn.

(1) in reactor A, add 15 kilograms, water, 2 kilograms, gelatin, soak molten 30 minutes, then stir and be warming up to 60-70 DEG C, after add 40 kilograms, urea;

(2) in reactor B, add 33 kilograms, water, 5 kilograms, ferrous sulfate, 1 kilogram, zinc sulfate, 1 kilogram, magnesium sulfate, 1 kilogram of manganous sulfate, 1 kilogram of boric acid, 2 kilograms of ammonium citrates successively, stir and heat to 50-60 DEG C;

(3) liquid in reactor B is injected to reactor A, continue to stir 2 hours, make modified gelatin composite solution, for subsequent use.

2, the preparation of second layer mould material (superfine activated humic acids pulvis), to produce 100 kilograms as example at every turn:

By 1 kilogram, 99 kilograms of precomminution 200-400 object humic acidss (total humic acid content >=50%) and activator (potassium hydroxide), after mixing, add micronizer mill, be crushed to 2500-3000 order, collect, for subsequent use.

3, coating process for the first time:

Fertile core-compound manure (N:P:K=11:44:0, i.e. monoammonium phosphate) particle is quantitatively sent in coating machine by travelling belt.

In rotary drum coating machine, the first layer coated fertilizer (modified gelatin composite solution) atomization is coated to fertile core (monoammonium phosphate) particle surface in motion, the consumption of the first layer mould material is 2% of coated fertilizer gross weight, pass through again drying machine, air seasoning, coated fertilizer is solidified in fertile slug particle surface and form composite gel coating, complete coating production technique for the first time.

4, coating process for the second time:

By a coated fertilizer preheating of above-mentioned the 3rd step gained, temperature is 40-50 DEG C, quantitatively sends into rotary drum coating machine, by tackiness agent (by tung oil and paraffin according to weight percent: tung oil 70%, paraffin 30%, mixed melting) be evenly sprayed at the material surface of motion, binder dosage is 1.5% of two film fertilizer gross weights, by travelling belt, second layer coated fertilizer (superfine activated humic acids pulvis) is quantitatively sent in rotary drum coating machine again, and be dispersed evenly to the material particles surface in motion, the consumption of second layer coated fertilizer is 3% of two film fertilizer gross weights, by stickiness and a motion roll extrusion of tackiness agent, make second layer coated fertilizer can evenly be bonded to material surface, after cooling, obtain secondary coated fertilizer, contain two film slow-release fertilizers of humic acids.

Embodiment 3: the preparation method who contains two film slow-release fertilizers of humic acids

1, the preparation of the first layer mould material (modified gelatin composite solution).To produce 100 kilograms as example at every turn.

(1) in reactor A, add 15 kilograms, water, 2 kilograms, gelatin, soak molten 30 minutes, then stir and be warming up to 60-70 DEG C, after add 40 kilograms, urea;

(2) in reactor B, add 33 kilograms, water, 5 kilograms, ferrous sulfate, 1 kilogram, zinc sulfate, 1 kilogram, magnesium sulfate, 1 kilogram of manganous sulfate, 1 kilogram of boric acid, 2 kilograms of ammonium citrates successively, stir and heat to 50-60 DEG C;

(3) liquid in reactor B is injected to reactor A, continue to stir 2 hours, make modified gelatin composite solution, for subsequent use.

2, the preparation of second layer mould material (superfine activated humic acids pulvis), to produce 100 kilograms as example at every turn:

By 1 kilogram, 99 kilograms of precomminution 200-400 object humic acidss (total humic acid content >=50%) and activator (potassium hydroxide), after mixing, add micronizer mill, be crushed to 2500-3000 order, collect, for subsequent use.

3, coating process for the first time:

Fertile core-compound manure (N:P:K=11:0:32, a kind of compound manure of nitrogenous potassium) particle is quantitatively sent in coating machine by travelling belt.

In rotary drum coating machine, the first layer coated fertilizer (modified gelatin composite solution) atomization is coated to fertile core (composite fertilizer) particle surface in motion, the consumption of the first layer mould material is 2% of coated fertilizer gross weight, pass through again drying machine, air seasoning, coated fertilizer is solidified in fertile slug particle surface and form composite gel coating, complete coating production technique for the first time.

4, coating process for the second time:

By a coated fertilizer preheating of above-mentioned the 3rd step gained, temperature is 40-50 DEG C, quantitatively sends into rotary drum coating machine, by tackiness agent (by tung oil and paraffin according to weight percent: tung oil 70%, paraffin 30%, mixed melting) be evenly sprayed at the material surface of motion, binder dosage is 1.5% of two film fertilizer gross weights, by travelling belt, second layer coated fertilizer (superfine activated humic acids pulvis) is quantitatively sent in rotary drum coating machine again, and be dispersed evenly to the material particles surface in motion, the consumption of second layer coated fertilizer is 3% of two film fertilizer gross weights, by stickiness and a motion roll extrusion of tackiness agent, make second layer coated fertilizer can evenly be bonded to material surface, after cooling, obtain secondary coated fertilizer, contain two film slow-release fertilizers of humic acids.

Embodiment 4: the application containing two film slow-release fertilizers of humic acids on wheat

For checking containing two film slow-release fertilizers of humic acids the effect on winter wheat, agricultural technology spread station arrangement in Sheqi County of Henan Province designs this test.

One, test materials and method

(1) test materials

1, test site: meter Qi Ying village, prosperous town, Sheqi County of Henan Province, 7 mu of test field areas, soil property is yellow soil, and one-tenth matrix is river alluvium, and irrigation condition is good, front stubble corn.The chemical examination of fetching earth on September 30th, 2011, result is: containing organic 15.8mg/kg, full nitrogen 1.24%, P 2o 523.2mg/kg, K 2o131mg/kg, pH value 6.8.Sowing stage of wheat on October 15th, 2011, machine sowing, kind hundred agricultures are short anti-58, application rate 11.5kg/ mu.

2, test fertilizer:

(1) conventional Bulk Blending Fertilizer (N:P:K=23:10:12), certain brand fertilizer is buied in market.

(2) two film Bulk Blending Fertilizer (N:P:K=23:10:12), by forming containing embodiment 1, embodiment 2, the prepared two film slow-release fertilizer blending containing humic acids of embodiment 3, two film slow-release compound fertilizer (P prepared by two film slow-release carbamides (N>=44.7%) 36%, embodiment 2 prepared by various raw material weight per-cent: embodiment 1 2o 5>=41.6%, N>=10.4%) 24%, embodiment 3 two film slow-release compound fertilizer (N>=10.4%, the K that prepare 2o>=30%) 40%.Two film Bulk Blending Fertilizer are provided by Beijing Aojia Fertilizer Co., Ltd..

(2) test design: 3 of test design are processed three times and repeated.

Process 1: clear area (not applying fertilizer, CK);

Process 2: conventional Bulk Blending Fertilizer, rate of fertilizer application 50kg/ mu;

Process 3: two film Bulk Blending Fertilizer 50kg/ mu.

The long 7.5m in experimental plot, wide 4m, folding area 30m 2, to arrange by random district group, all the other areas are divided into contrast demonstration side.

(3) field management: emerged on October 21st, 2011 in experimental plot.On February 20th, 2012 is watered drought resisting once with well water, the about 50m3/ mu of irrigation quantity; Carry out in March, 2011-May 4 times " spray three is anti-".

(4) mensuration project and method

1, growing stage is measured: in good time researching determining tillering phase, jointing stage, heading stage, blooming stage and ripening stage from emerging.

1.4.2 determination of yield: before gathering in the crops on June 1st, 2012, choose the middle 5 row wheats (1m is wide) in every community and check and examine continuously long (the folding 3m of 3m 2) wheat number of productive ear, gather in after drying threshing thereupon and take that seed is real to be produced, measure according to this 667m 2output, and choose representative 10 strain wheats, measure that plant height, stem are thick, spike length, fringe grain and grain heavy, calculate thousand seed weight.

2 results and analysis

The impact of 2.1 different treatment on wheat growth stage: in table 1

Table 1: different treatment wheat is given birth to dynamically and growing stage is observed record table

Process Basic Seedling Total tiller number before winter Secondary root number before winter The cold-resistant phase The drought-enduring phase 1 18.3 90.4 6.8 Generally Generally 2 18.1 123 9.6 Better Better 3 18.1 125 9.9 Good Good

Table 1 result shows, processes before 3 pairs of film fertilizer winters and tillers and have more 20,000 than processing 2 conventional fertilizer, and before the winter, secondary root has more 0.3, and winter resistance, drought resistance all do very well than the fertile district of routine.

The impact of 2.2 different treatment on wheat yield: in table 2

Table 2: different treatment wheat yield investigation result summary sheet

Table 2 result shows: process the two film fertilizer of 3() output than processing 1(ck) volume increase 193.3kg/ mu, stimulation ratio 38.9%; Process the two film fertilizer of 3() than processing the nutrient conventional fertilizer applications such as 2() volume increase 60.7kg, stimulation ratio 9%.

3, conclusion

Test-results shows, two film slow-release fertilizers containing humic acids can obviously promote growth of wheat roots, increase the amount of tillering, cold-resistant and drought-enduring with the obvious advantage, output three elements (mu spike number, grain number per spike, thousand seed weight) have corresponding raising, and the effect of increasing income is remarkable compared with conventional fertilizer application.

Experimental example 5: the impact of growth of maize being grown containing two film slow-release fertilizers of humic acids

One, test objective

Taking granular urea or compound manure as fertile core containing two film slow release fertilizers (hereinafter to be referred as two film fertilizer) of humic acids, taking modified gelatin composite solution as the first layer coated fertilizer, taking superfine activated humic acids as second layer coated fertilizer, through the new-type fertilizer of special process processing.This group test objective is relatively more two film fertilizer (embodiment 1) and the impact, the effect of increasing production that wait nutrient common fertilizer to grow growth of maize, measures two film N-fertilizer efficiencies.

Two, experiment place

Beijing Aojia Fertilizer Co., Ltd. greenhouse

Three, testing program

This test is established three processing, is repeated for three times.

Process 1, contrast, does not apply fertilizer;

Process 2, common Bulk Blending Fertilizer (N:P:K=23:10:12), various raw material weight per-cent: granular urea (N>=46.4%) 50%, granular general calcium (P 2o 5>=16%) 9%, granular coarse whiting (P 2o 5>=40%) 21%, granular Repone K (K 2o>=60%) 20%.Directly bought by market with apply fertilizer.

Process 3, two film slow-release fertilizers (N:P:K=23:10:12) of preparing containing embodiment 1, two film slow-release carbamides (N>=44.7%) 51.5% prepared by various raw material weight per-cent: embodiment 1, granular general calcium (P 2o 5>=16%) 5.5%, granular coarse whiting (P 2o 5>=40%) 23%, granular Repone K (K 2o>=60%) 20%., except 1 pair of film slow-release carbamide of embodiment, directly buy by market with apply fertilizer.

Three, test materials and method

(1) sandy culture:

Test is carried out in the plastic tub of 20 centimetres of high 25 centimetres, diameters, it is 0.5-2.0 millimeter river for building sand that every basin packs diameter into, first, by the salt acid soak of 1:3 24 hours for sand, removes wherein nutritive substance, then rinse to neutral with clear water, finally within 24 hours, be for experiment with distilled water immersion.According to testing program, 5 grams of each processing institute fertilises are packed in basin, every basin packs 7 kilograms of sands into, when dress basin, first 5 kilograms of sands are mixed and packed in basin with this processing institute fertilise, sow 25 maize seeds on surface, and then 2 kilograms of sands are covered to seed-coat, in basin, water as 10% of sand weight, every basin field planting 15 strains after emergence of corn.

(2) microcell method

Test is carried out in greenhouse test pond, test microcell is each 2 meters of length and width, in pond, be through well-mixed arable soil, by testing program, 300 grams, required each processing fertilizer (amounting to 50 kgs/acre) unification is made to base fertilizer, plough under in soil seeding corn 5 row in each pond, every pond final singling 25 strains after emergence of corn with whole, breeding time, timely diseases prevention deinsectization, managed with delicacy.After corn maturation, the air-dry meter of harvesting corn seed and straw produces respectively, fetches each processing plant and seed sample, first through 105 DEG C of green grass or young crops of stopping, then dries, weighs, measures total nitrogen content through 60 DEG C.

Four, test-results

(1) sand culture test result

1, breeding time, growing way was described

Test in sowing on June 13rd, 2012, June 18 emerged, every basin final singling 15 strains on June 25, and the next day, waters, and emerges and within 10 days, 20 days, 30 days and 40 days, carries out observed and recorded.

Each processing growing way of first 10 days is basically identical.Within 10 days, start to occur difference, the speed of growth of processing 1 maize seedling slows down later; Process 2, process 3 difference of them not obvious.After 20 days, process 1 maize seedling and substantially stop growing; Process 2 maize seedling cane blades sagging, the jaundice of leaf look, there is lodging in indivedual plant; Process 3 and be better than processing 2, maize seedling blade is aobvious straight and upright, and dark green leaf color, without lodging phenomenon.After 30 days, process 1 and start to wither; Processing 2 starts to stop growing; Process that 3 maize seedlings are thick from plant height, stem, leaf look etc. is all significantly better than processes 2.Within 40 days, each processing of maize seedling substantially all stops growing.

2, stop the investigation result after growth

(1) over-ground part dry matter comparison: the results are shown in Table 3

Table 3: respectively process the comparison of over-ground part dry matter (gram)

Process Test 1 Test 2 Test 3 On average Process 1 1.78 1.41 1.67 1.62 Process 2 4.91 5.18 5.02 5.04 Process 3 5.58 5.78 5.68 5.68

Table 3 result shows: use the maize seedling over-ground part dry matter of two film slow-release fertilizers apparently higher than contrast and common Bulk Blending Fertilizer.

(2) Maize Stem slightly compares: the results are shown in Table 4

Table 4: respectively process the thick comparison sheet of Maize Stem (millimeter)

Process Test 1 Test 2 Test 3 On average Process 1 3.14 3.29 2.96 3.13 Process 2 4.28 4.57 4.50 4.45 Process 3 4.92 4.87 4.89 4.89

Table 4 result shows, uses the maize seedling stem of two film slow-release fertilizers slightly apparently higher than contrast and common Bulk Blending Fertilizer.

(3) plant height when harvest corn: the results are shown in Table 5

Table 5: plant height comparison when harvest corn (centimetre)

Process Test 1 Test 2 Test 3 On average Process 1 26.40 28.90 26.70 27.33 Process 2 48.30 49.60 48.60 48.83 Process 3 55.60 54.10 53.80 54.50

Table 5 result shows, uses the maize seedling plant height of two film slow-release fertilizers apparently higher than contrast and common Bulk Blending Fertilizer.

(2) micro-plot experiment result

1, breeding time, growing way was described

On June 13rd, 2012, sowing, gathered in the crops on October 15th, 2012.In whole breeding time, from aspects such as plant height, leaf look, Ye Kuan, growing ways, process 3 significantly better than processing 1 and process 2.From the constituent element of output, the increase of spike length degree, bald sharp minimizing, grain number per spike and thousand seed weight increase, full seed.

2, the yield result of corn: in table 6

Table 6: corn grain yield result (gram)

Process Test 1 Test 2 Test 3 On average Process 1 2602.00 2638.00 2598.00 2612.67 Process 2 2965.00 2810.00 2796.00 2857.00 Process 3 3205.00 3226.00 3316.00 3249.00

Table 6 result shows, processes 3 and processes 1(contrast) volume increase 24.4%, process the common Bulk Blending Fertilizer of 2() volume increase 13.7%.Be equivalent to 65 kilograms of mu volume increase, with suitable in field experiment results (increasing production 70 kgs/acre) such as Jian An villages, Yuanzhi County, Hebei province.

(3) utilization ratio of fertilizer nitrogen

Corn kernel and straw total nitrogen content after results are measured, calculated this season utilization ratio of nitrogen with minusing, the results are shown in Table 7.

Table 7: the utilization ratio of fertilizer

Table 7 result shows: in two film slow-release fertilizers, nitrogen utilization efficiency is 39.88%, and more common Bulk Blending Fertilizer improves 8 percentage points, is equivalent to improve 25.5%.

Five, result and discussion

Verify by Preliminary Experiment, significantly improve containing nitrogen utilization efficiency in two film slow-release fertilizers of humic acids, and increasing both production and income, good application value there is.

Although, above use general explanation, embodiment and test, the present invention is described in detail, on basis of the present invention, can make some modifications or improvements it, and this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.

Claims (9)

1. containing two film slow-release fertilizers for humic acids, made by the composition of following weight part: fertile core 90-98 part, the first layer coating 0.5-5 part, second layer coating 1-5 part and tackiness agent 0.5-2 part form, and described fertile core is granular urea or compound manure; The particle size range of described granular urea is 2.00mm-4.75mm, and described compound manure is at least two kinds of nutrients in nitrogenous, phosphorus, three kinds of nutrients of potassium, the spherical granules fertilizer of being made up of chemical process; Described the first layer coated fertilizer is made up of the composition of following weight percent: gelatin 1-3%, urea 20-40%, ferrous sulfate 5-25%, zinc sulfate 1-5%, magnesium sulfate 1-5%, manganous sulfate 0.3-2%, boric acid 0.3-2%, ammonium citrate 2-5% and water 30-55%; Described second layer coated fertilizer is made up of the composition of following weight percent: humic acids 99% and activator 1%, described activator is potassium hydroxide, described tackiness agent is tung oil and paraffin mixed melting thing, the wherein weight percent of tung oil and paraffin: tung oil 70-80%, paraffin 20-30%.
2. according to claim 1 pair of film slow-release fertilizer, is characterized in that, described pair of film slow-release fertilizer is made up of the composition of following weight part: fertile core 93.5-96.5 part, the first layer coating 0.5-2 part, second layer coating 2-3 part and tackiness agent 1-1.5 part form.
3. according to claim 1 pair of film slow-release fertilizer, is characterized in that described composite fertilizer is that N:P:K is 11:44:0,11:0:32 or 15:15:15.
4. according to claim 1 pair of film slow-release fertilizer, is characterized in that, in the time that fertile core is granular urea, described film-coated and slow release fertilizer is made up of the composition of following weight part: 1 part, 96.5 parts, fertile core, 0.5 part of the first layer coating, 2 parts of second layer coatings and tackiness agent.
5. according to claim 1 pair of film slow-release fertilizer, is characterized in that, in the time that fertile core is compound manure, described film-coated and slow release fertilizer is made up of the composition of following weight part: 1.5 parts, 93.5 parts, fertile core, 2 parts of the first layer coatings, 3 parts of second layer coatings and tackiness agent.
6. according to the two film slow-release fertilizers described in claim 1-5 any one, it is characterized in that, described the first layer coated fertilizer is made gelatin 2-2.5%, urea 20-40%, ferrous sulfate 5-20%, zinc sulfate 1-1.5%, magnesium sulfate 1-1.5%, manganous sulfate 0.5-1%, boric acid 0.5-1%, ammonium citrate 2-2.5% and water 48-51% by the composition of following weight percent.
7. according to the two film slow-release fertilizers described in claim 1-5 any one, it is characterized in that, described second layer coated fertilizer is prepared by following methods: take each composition according to proportioning, pulverize and reach 2500-3000 order.
8. a method of preparing the two film slow-release fertilizers described in claim 1-7 any one, is characterized in that, the method comprises the following steps:
1) preparation of the first layer coated fertilizer: take the each composition in the first layer coated fertilizer according to proportioning, add part water, gelatin in reactor A, stir and be warming up to 60-70 DEG C, add urea; In reactor B, add successively residue water, ferrous sulfate, zinc sulfate, magnesium sulfate, manganous sulfate, boric acid, ammonium citrate etc., stir and heat to 50-60 DEG C; Liquid in reactor B is injected to reactor A, continue to stir 2 hours, make the first layer coated fertilizer, for subsequent use;
2) the first layer coating process: the atomization of the first layer coated fertilizer is coated to the fertile wicking surface in motion, and air seasoning, solidifies in fertile slug particle surface coated fertilizer, completes coating for the first time;
3) second layer coating process: by step 2) a described coated fertilizer preheating, preheating temperature 40-50 DEG C, tackiness agent is evenly coated to the material surface of motion, again second layer coated fertilizer is dispersed evenly to the material surface in motion, and make it to be bonded to material surface, after cooling, obtain the two film slow-release fertilizers containing humic acids.
9. the two film slow-release fertilizers described in claim 1-7 any one are applied in the dedicated fertilizer of preparation winter wheat, corn, cotton, peanut, soybean, paddy rice.
CN201310073208.1A 2013-03-07 2013-03-07 Double membrane slow release fertilizer containing humic acid and preparation method thereof CN103121878B (en)

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